The double resonance behavior of microwave magnetic permeability has been observed for multiwalled carbon nanotube composites containing Ni catalyst. One of them is due to the natural resonance at 6.00GHz and another is due to the exchange resonance at 10.11GHz. The natural resonance is dependent on magnetocrystalline anisotropy and shape anisotropy of Ni nanostick catalyst and the calculated result of exchange resonance mode with a few modifications was close to the experiment. It is believed that the coexistence of natural resonance and exchange resonance is benefial to large bandwidth as a microwave absorber.

Background: Cognitive Muscular TherapyTM (CMT) is an integrated behavioural intervention developed for knee osteoarthritis. CMT teaches patients to reconceptualise the condition, integrates muscle biofeedback and aims to reduce muscle overactivity, both in response to pain and during daily activities. This nested qualitative study explored patient and physiotherapist perspectives and experiences of CMT.Methods: Five physiotherapists were trained to follow a well-defined protocol and then delivered CMT to at least two patients with knee osteoarthritis. Each patient received seven individual clinical sessions and was provided with access to online learning materials incorporating animated videos. Semi-structured interviews took place after delivery/completion of the intervention and data were analysed at the patient and physiotherapist level.Results: Five physiotherapists and five patients were interviewed. All described a process of changing beliefs throughout their engagement with CMT. A framework with three phases was developed to organise the data according to how osteoarthritis was conceptualised and how this changed throughout their interactions with CMT. Firstly, was an identification of pain beliefs to be challenged and recognition of how current beliefs can misalign with daily experiences. Secondly was a process of challenging and changing beliefs, validated through new experiences. Finally, there was an embedding of changed beliefs into self-management to continue with activities. Conclusion:This study identified a range of psychological changes which occur during exposure to CMT. These changes enabled patients to reconceptualise their condition, develop a new understanding of their body, understand psychological processes, and make sense of their knee pain.

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Multiwalled carbon nanotubes filled with face centered cubic Co nanoparticles (MWCNTs/Co) were successfully prepared by a chemical reducing method. The average outer diameter of MWCNTs is about 40 nm and the size of Co nanoparticles is in the range from 5 to 20 nm. The relative permeability and permittivity spectra of MWCNTs/Co resin composites with 50 wt % powders were measured in the frequency range of 0.1–18 GHz. Three resonance absorption peaks are observed in the μ″−f spectrum: the peak around 5.0 GHz can be attributed to natural resonance, while the other two appear around 10.6 and 16.9 GHz are induced by exchange resonance. It is found that the peak with minimum reflection loss (RL) value moves to lower frequencies and the RL value increases from 4.2 to 10.1 dB with the increase of the absorber’s thickness from 2 to 6 mm.

Planar anisotropy Y2Fe17 powders were fabricated by rapid quenching and ball-milling techniques. The frequency dependence of complex permeability and permittivity of paraffin composites with 35 vol% Y2Fe17 powders have been investigated in the frequency range 0.1–10 GHz. The oriented composite shows a dramatic increase in permeability and a remarkable decrease in the matching thickness. The minimum reflection losses of unoriented Y2Fe17 composite and oriented Y2Fe17 composite were −48 dB at 2.34 GHz and −59 dB at 3.4 GHz, and the corresponding thicknesses were only 3.9 mm and 2.3 mm, respectively. Otherwise, the product of the static permeability and the resonance frequency for the oriented Y2Fe17 compound is 91.6 GHz, which is much higher than the value of 15.3 GHz calculated by Snoek's limit equation. Hence, the Y2Fe17 composite, with the specific property of the planar anisotropy, has great potential applications in the field of high-frequency microwave absorption.